Deck 25: Electronic Transmission Controls

Question 1

What electronic control module is used to control the shifting of an electronically controlled automatic transmission/ transaxle?

A) TCU
B) PCM
C) TCM
D) Any of the above, depending on application

Answer 1

D

Question 2

A transmission control module (TCM) has just been replaced. Which parameters should be programmed into the TCM using a scan tool?

A) Vehicle emissions information
B) Tire size
C) Vehicle weight
D) Odometer reading

Answer 2

B

Question 3

What type of sensor measures speed?

A) Thermistor
B) Transducer
C) Potentiometer
D) Frequency generator

Answer 3

D

Question 4

The transmission range (TR) switch is used to ________.

A) keep the engine from starting in any gear position except park or neutral
B) operate the backup lights in reverse
C) limit upshifts in manual ranges
D) All of the above

Question 5

The input speed sensor is also called a ________.

A) vehicle speed (VS) sensor
B) turbine speed sensor (TSS)
C) output speed sensor (OSS)
D) Any of the above, depending on make and model

Question 6

The output speed sensor is also called a ________.

A) turbine speed sensor (TSS)
B) output speed sensor (OSS)
C) vehicle speed (VS) sensor
D) Any of the above, depending on make and model

Question 7

What type of sensor is the transmission fluid temperature (TFT) sensor?

A) Transducer
B) Rheostat
C) Negative temperature coefficient (NTC) thermistor
D) Potentiometer

Question 8

Linear solenoids are used for ________.

A) TCC
B) shifting
C) pressure control
D) All of the above, depending on application

Question 9

What does the electronic pressure control (EPC) solenoid use to control mainline pressure?

A) Current
B) Voltage
C) Resistance
D) Torque

Question 10

Adaptive control means ________.

A) the default position which may be 2nd, 3rd, or 4th gear depending on application
B) the delay between the command and when the shift occurs
C) the time it takes to make a shift
D) the change in the pressure or timing to keep the shift occurring at the same time to make up for wear

Question 11

What type of sensor measures temperature?

A) Frequency generator
B) Transducer
C) Thermistor
D) Potentiometer

Question 12

Technician A says that the transmission control module may be located inside the transmission. Technician B says that in most electronically controlled transmissions, shifting is controlled by solenoids. Who is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 13

The controlling unit for an electronically shifted transmission is the ________.

A) throttle position sensor
B) TCM
C) vehicle speed sensor
D) None of these

Question 14

A ________ is an electromagnetic device that can be used to control fluid pressure in a hydraulic circuit.

A) solenoid
B) neutral start switch
C) TCM
D) vehicle speed sensor

Question 15

If the solenoids fail in a transmission with electronic shift controls, the transmission will ________.

A) operate in reverse only
B) be ruined if the car is driven
C) not have any forward gears
D) operate in only one gear

Question 16

Technician A says that the transmission range switch is located in the shift console Technician B says that the transmission range switch is operated by the manual shift linkage. Who is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 17

The vehicle speed sensor is located ________.

A) at the front wheel speed sensor
B) in the speedometer
C) near the rear drive axle
D) at the transmission output shaft

Question 18

The transmission pressure switches are located at the ________.

A) throttle body
B) throttle cable
C) valve body
D) transmission case

Question 19

Technician A says that the transmission control system can communicate with diagnostic test equipment. Technician B says that most late model control systems can run pre-programmed system diagnostics and generate trouble codes. Who is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 20

Technician A says that electronic transmissions may control shifts by applying shift solenoid output directly to the bands and clutches. Technician B says that electronic transmissions may control shifts by directing the shift solenoid output pressure to the shift valves. Who is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 21

Which type sensor is typically used to measure input shaft speed?

A) Reed switch
B) Magnetic pulse generator
C) Photoresistor
D) None of these

Question 22

The torque management feature ________ engine torque during shifting.

A) removes
B) maintains
C) increases
D) reduces

Question 23

When the brake pedal is pressed the brake switch causes the TCM to release the ________.

A) one-way clutch
B) front band
C) front clutch
D) torque converter clutch

Question 24

Which of these is NOT a sensor type used on an electronically controlled transmission?

A) Frequency generator
B) Vacuum sensor
C) Thermistor
D) Potentiometer

Question 25

Refer to this chart. What gear will be selected if the solenoid power supply fails?

A) First
B) Second
C) Third
D) Fourth

Question 26

Refer to this chart. What gear will be selected if both shift solenoids fail?

A) First
B) Second
C) Third
D) Fourth

Question 27

What is the function of the "M" position on this shift selector?

A) Allows manual up and down shifting
B) Allows the driver to slowly move the vehicle forward and backwards
C) Allows motor stop/start
D) Selects forward or reverse motion